A nurse in an emergency department is reviewing a client's ECG reading.
Which of the following findings should the nurse identify as an indication that the client has first-degree heart block?
Prolonged PR intervals.
Nondiscernible P waves.
More P waves than QRS complexes.
No correlation between P and QRS waves.
The Correct Answer is A
First-degree heart block is a type of atrioventricular (AV) block that involves the consistent prolongation of the PR interval (defined as >0.20 seconds) due to delayed conduction via the atrioventricular node.
This is seen on an ECG as a PR interval greater than 200 ms in length.
Choice B: Nondiscernible P waves are not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice C: More P waves than QRS complexes is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice D: No correlation between P and QRS waves is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
When administering packed RBCs, the tubing should be primed with 0.9% sodium chloride.
Transfusing each unit of blood over 5 hours (choice A) is not recommended as it may increase the risk of bacterial growth.
Packed RBCs should be transfused over 2 to 3 hours.
Changing the IV tubing after each unit of blood is transfused (choice B) is not necessary.
Administering the blood through a 22-gauge intravenous catheter (choice D) may not be appropriate as a larger gauge catheter is typically used for blood transfusions.
Correct Answer is C
Explanation
“Fluid volume excess.” Bounding pulses, crackles on auscultation, and pink frothy secretions when receiving suctioning are all signs of fluid volume excess.
Fluid volume excess can occur when the heart is unable to pump blood efficiently, causing fluid to build up in the lungs.
Choice A is not the correct answer because the increased cardiac output would not cause these symptoms.
Choice B is not the correct answer because pleural effusion refers to a buildup of fluid between the layers of tissue that line the lungs and chest cavity, which would not cause these symptoms.
Choice D is not the correct answer because aspiration refers to the inhalation of food, liquid, or other substances into the lungs, which would not cause these symptoms.
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